[%c_arrow b1b2;keyPressed;none;from;b1;opacity;0.8;to;b2;persistent;false,d1a1;keyPressed;none;from;d1;opacity;0.8;to;a1;persistent;false] A very interesting and dangerous plan: place the king on b2 and the rook on a1.
29... c8c4  30. b3d4  30... c4c8  31. h4h5  31... c8d8 